Incident Score: Analysis & Impact (HEN1772058976)
The details regarding individual company incidents & reports gives you full view from every side.
Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Hennessy Advisors, Inc.'s Breach and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Hennessy Advisors, Inc. Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Hennessy Advisors, Inc. breach identified under incident ID HEN1772058976.
The analysis begins with a detailed overview of Hennessy Advisors, Inc.'s information like the linkedin page: https://www.linkedin.com/company/hennessy-advisors-inc., the number of followers: 191, the industry type: Investment Management and the number of employees: 10 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 743 and after the incident was 681 with a difference of -62 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on Hennessy Advisors, Inc. and their customers.
On 23 February 2026, Hennessy Advisors disclosed Data Breach issues under the banner "Hennessy Advisors Data Breach Impacting Sensitive Personal Information".
Hennessy Advisors disclosed a data breach where unauthorized access to its systems may have compromised sensitive personal identifiable information (PII).
The disruption is felt across the environment, and exposing Sensitive personal identifiable information (PII).
In response, and stakeholders are being briefed through Notification via mail to impacted individuals, offering complimentary credit monitoring services.
The case underscores how Completed, with advisories going out to stakeholders covering Notification via mail with details on exposed data and complimentary credit monitoring services.
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating unauthorized access to its systems may have compromised sensitive PII and Exploit Public-Facing Application (T1190) with lower confidence (40%), supported by evidence indicating suspicious activity affecting certain systems and data. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate to high confidence (70%), supported by evidence indicating social Security numbers, financial account details compromised and OS Credential Dumping (T1003) with moderate confidence (50%), supported by evidence indicating unauthorized third party accessed sensitive data. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating names, Social Security numbers, financial account details exposed and Data from Information Repositories (T1213) with moderate to high confidence (70%), supported by evidence indicating sensitive personal identifiable information (PII) compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating unauthorized third party accessed sensitive data and Transfer Data to Cloud Account (T1537) with moderate confidence (50%), supported by evidence indicating data breach impacting sensitive personal information. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating suspicious activity affecting certain systems and data and Data Manipulation: Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating unauthorized access to its systems may have compromised PII. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Hennessy Advisors, Inc. Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/hennessy-advisors-inc./incident/HEN1772058976
- Hennessy Advisors, Inc. CyberSecurity Rating page: https://www.rankiteo.com/company/hennessy-advisors-inc.
- Hennessy Advisors, Inc. Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/hen1772058976-hennessy-advisors-breach-march-2025/
- Hennessy Advisors, Inc. CyberSecurity Score History: https://www.rankiteo.com/company/hennessy-advisors-inc./history
- Hennessy Advisors, Inc. CyberSecurity Incident Source: https://straussborrelli.com/2026/02/25/hennessy-advisors-data-breach-investigation/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf